Fix various Ruff errors

1 files changed, 4 insertions, 2 deletions

diff --git a/sphinx/pycode/__init__.py b/sphinx/pycode/__init__.py
index 19e478f57..9ffb607db 100644
--- a/sphinx/pycode/__init__.py
+++ b/sphinx/pycode/__init__.py
@@ -6,14 +6,16 @@ import re
 import tokenize
 from collections import OrderedDict
 from importlib import import_module
-from inspect import Signature
 from os import path
-from typing import Any
+from typing import TYPE_CHECKING, Any
 from zipfile import ZipFile
 
 from sphinx.errors import PycodeError
 from sphinx.pycode.parser import Parser
 
+if TYPE_CHECKING:
+    from inspect import Signature
+
 
 class ModuleAnalyzer:
     annotations: dict[tuple[str, str], str]